UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net (loss)/income	[1]	$ (10,409)	$ 3,702	$ 1,791	$ 56,665
Other comprehensive (loss)/income, net of tax
Unrealized gain/(loss) on available-for-sale marketable securities, net of tax	[1]	73	(1)	(115)	126
Foreign currency translation adjustments	[1]	(7,414)	4,043	(2,977)	6,272
Total other comprehensive (loss)/income, net of tax	[1]	(7,341)	4,042	(3,092)	6,398
Comprehensive (loss)/income	[1]	$ (17,750)	$ 7,744	$ (1,301)	$ 63,063

[1] On January 1, 2018 the Company adopted the ASC 606 revenue recognition standard and has adjusted prior periods to conform. See Note 2. "New Accounting Pronouncements" for additional information.